That's exactly what the custom sort title is for. By default, that field is hidden. You can enable it in the song editor by tapping on Configure Fields, and then check the box for the custom sort title. If you entered "A Train" in the custom sort title, it would put it in the "A" section regardless of any other sorting rules. I don't really want to make the sorting stuff any more complicated than it already is by having special characters that I have to process to conditionally ignore sections of the title (and to strip that out while displaying the song title everywhere).
I don't recall having any issues with sorting or alphabet letters when there is a song that starts with "Les" and "Les" is one of the articles to ignore. I'll test this out again, but at least with the language set to English, it wasn't an issue for me.
Mike
Update: I just verified that ignoring "Les" with a song starting with "Les" didn't cause any issues.
I don't recall having any issues with sorting or alphabet letters when there is a song that starts with "Les" and "Les" is one of the articles to ignore. I'll test this out again, but at least with the language set to English, it wasn't an issue for me.
Mike
Update: I just verified that ignoring "Les" with a song starting with "Les" didn't cause any issues.